Arizona · 50 Miler · 55K · 13 Miler NIGHT
Colossal-Vail 50/50
Colossal-Vail 50/50 is a 50 Miler, 55K, 13 Miler NIGHT and 13 Miler event held in Vail, Arizona. Its next confirmed date is Saturday, December 5, 2026. About 106 runners take part across all distances.
- Race day
- December 5, 2026
- Location
- Vail, AZ
- Field size
- ~106 runners
Race details
- Date
- Saturday, December 5, 2026
- Location
- Vail, Arizona
- Distances
- 50 Miler, 55K, 13 Miler NIGHT, 13 Miler
- Field size
- About 106 runners
- Course
- 4000 ft gain
- Registration
- runazt.org
Registration, course & weather
- Start time
- 7:00 AM MST
- Course profile — 50 Miler
- Out-and-back course; Trail surface; 4000 ft gain, 4000 ft loss (estimated from third-party elevation data)
- Course profile — 55K
- Out-and-back course; Trail surface; 2300 ft gain, 2300 ft loss (estimated from third-party elevation data)
- Course profile — 13 Miler
- Out-and-back course; Trail surface; 1300 ft gain, 1300 ft loss (estimated from third-party elevation data)
- Course profile — 13 Miler NIGHT
- Out-and-back course; Trail surface; 950 ft gain, 950 ft loss (estimated from third-party elevation data)
About the Colossal-Vail 50/50
Colossal-Vail 50/50 in Vail, AZ.
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Colossal-Vail 50/50: common questions
- When is the Colossal-Vail 50/50?
- The next confirmed date is Saturday, December 5, 2026.
- Where is the Colossal-Vail 50/50 held?
- In Vail, Arizona.
- What distances does the Colossal-Vail 50/50 offer?
- 50 Miler, 55K, 13 Miler NIGHT and 13 Miler.
- How many people run the Colossal-Vail 50/50?
- About 106 runners across all of its distances. That figure is an estimate of the field size, not an entry cap.
- How do I register for the Colossal-Vail 50/50?
- Registration is handled by the organiser at runazt.org. Entry fees, caps and deadlines are set there.
- What time does the Colossal-Vail 50/50 start?
- 7:00 AM MST.
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